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影片>不用電的環保燈泡(窮人的電燈)

Submitted by on 2013/07/13 - 23:08 | No Comment |

http://www.youtube.com/watch?v=rYTIYUUK70I

影片>不用電的環保燈泡(窮人的電燈)
How to Build a Solar Bottle Bulb 2.0 ( Updated English Version)

[v1]rYTIYUUK70I[/v1]

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